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  1. #1
    Junior Member
    Join Date
    Apr 2010
    Location
    Vilnius, Lithuania
    Posts
    18

    S-type 2.7D turbo problems

    Hello, I will try to explain my problem and hopefully some of you will have some ideas on what could be the real culprit and what I should do next.

    My problem with the turbo is that I get a Restricted performance error and an orange CEL while accelerating a little heavier. It can happen two ways: If I accelerate hard then the car would jerk a little and the turbo would be switched off, the car would lose power over around 2500 rpm - cruise control would not work and I would have to stop the car and restart. I could drive normaly (turbo working and all) after I stopped and started driving again. If I restarted the engine the message would disappear but even if I didn't (i.e. stopped but didn't switch of the engine) I could drive normally with the message still on-screen. The other way is (and it's a lot more common, since I don't floor it that often) - the car is driving with cruise control on, let's say on a hill, or accelerating (with the CC resume function) up to the speed it had before then the message would appear but no obvious loss of power would occur the cruise control would still work. In both cases restarting the engine removes the problem for the time. It is a lot more common with the engine having not reached working temperature. If the temp is perfect - I can nearly floor the car and the message would not come on.

    The codes I get for this are:

    P0046-00 Turbo/S/C boost control solenoid A (MAF0)
    P010F-00 Mass of volume AFS A/B correlation
    P004B-00 (or is it P0048-00) Turbo/S/C boost control solenoid B (MAF1)
    P0299-00 Turbo/S/C underboost
    P062B-00 Internal CM fuel injection control performance

    The dealer says the problems is with a right (passenger) side turbo. I only want to gather as much information as I can that I could be able to explain what my problem is to the mech and also that I know what really must be done - since I don't have a warranty I don't want to get ripped off. The official dealer last time proposed a change of turbos for a little more than $5000 and finished with inspiring words - "but we're not sure that will really help".

    So any ideas and help appreciated.

  2. #2
    Member
    Join Date
    Mar 2010
    Posts
    70

    Re: S-type 2.7D turbo problems

    Where are you in the country.

    i had my car in to the dealer to check a peroblem and the quote they gave me was rediculous....I looked around and found a indepndant Jag specalist who was half the price.

  3. #3
    Junior Member
    Join Date
    Apr 2010
    Location
    Vilnius, Lithuania
    Posts
    18

    Re: S-type 2.7D turbo problems

    I'm way in the east - Lithuania near the Baltic Sea. So I don't have that much to choose from. Mostly - educating my friendly family mechanic.

  4. #4
    Senior Member
    Join Date
    Jun 2008
    Location
    N.I
    Posts
    2,142

    Re: S-type 2.7D turbo problems

    These things will do that when cold to stop you from damaging the engine.
    The other thing is that they do have trouble with turbo actuators as well which would normally not allow the turbo to give boost properly.
    A right few people on here have replaced them for that reason alone.
    However, if your mech is handy he can manually free up the actuator by hand from underneath the car.
    Thing is, that's not a complete fix and will seize up again if car not used regularly and tramped on a bit when fully warm.
    smile they said, life could be worse! so i did and it was!!!!

  5. #5
    Junior Member
    Join Date
    Apr 2010
    Location
    Vilnius, Lithuania
    Posts
    18

    Re: S-type 2.7D turbo problems

    I understand that it should be a very natural precaution to prevent damage to the engine, but in my case it happens during very slight acceleration and since we have two S-Type 2.7Ds in our family I know how a healthy one performs.

    Could you please tell me more about the actuators? The mechs I consulted with told me I have a problem with the electronic module because I even had the turbo's geometry calibrated (not sure about my vocabulary, sorry about that) and it made no difference.

  6. #6
    Senior Member
    Join Date
    Jun 2008
    Location
    N.I
    Posts
    2,142

    Re: S-type 2.7D turbo problems

    Did you have them off the car
    Did they check boost as well
    If so, then the control module could well be faulty and throwing them off instead.
    Not sure if they are programmed to that car alone or whether you can check your car with the healthy one.
    Some of the Jag tech's should be able to help you there if they are feeling helpful.
    smile they said, life could be worse! so i did and it was!!!!

  7. #7
    Junior Member
    Join Date
    Apr 2010
    Location
    Vilnius, Lithuania
    Posts
    18

    Re: S-type 2.7D turbo problems

    The mechs pointed to the passenger side turbo (right side in my case) and I had it removed and calibrated. I believe they checked the boost as they sayd that mechanically it is all in good order.

    I'd be real glad if the techs felt like helping.

  8. #8
    Senior Member
    Join Date
    Jun 2008
    Location
    N.I
    Posts
    2,142

    Re: S-type 2.7D turbo problems

    Then the actuator on that turbo should be fine and thats the side they are looking at, so the other side must be ok as they would not go to all that trouble and overlook it.
    Module does sound a sensible option, Never heard anyone on here mention a faulty one before though.
    That's not to say your's is not faulty. They do seem to know what they are doing all the same as i suspect they thought the variable vane was off and therefore so was the boost. So if it's still off, the boost control module you talk of could well be the next thing to check as i suspect they would have found any leaks while removing and refitting the pipe work to the turbo.
    smile they said, life could be worse! so i did and it was!!!!

  9. #9
    Senior Member
    Join Date
    Apr 2008
    Location
    Newcastle, up North
    Posts
    1,611

    Re: S-type 2.7D turbo problems

    Don't always believe what the fault codes are telling you as in many cases they are just giving you and idea of what the problem could be.

    I amazingly had 11 fault codes a few weeks ago pointing at all sorts of possible problems!!! I eventually traced the fault to a broken coil wire.

    As STypeD said, I don't think anyone has had any problems with the turbo electronic controls as the faults have always been actuator related.
    2003 S-Type 3.0 Sport manual, LPG, fitted myself
    2004 C5 Corvette Z06, 5.7 V8

  10. #10
    Junior Member
    Join Date
    Apr 2010
    Location
    Vilnius, Lithuania
    Posts
    18

    Re: S-type 2.7D turbo problems

    I will still have them look at the actuators.

    One of the techs said it could be due to wire corrosion but said he doesn't have the schematics and couldn't look at it without them. He's obviously an independent tech and Jaaaaaags are not his bread and butter.


 
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